package com.ruoyi.flowable.controller;

import com.ruoyi.common.annotation.Log;
import com.ruoyi.common.core.controller.BaseController;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.core.domain.entity.SysRole;
import com.ruoyi.common.core.domain.entity.SysUser;
import com.ruoyi.common.enums.BusinessType;
import com.ruoyi.flowable.domain.dto.FlowSaveXmlVo;
import com.ruoyi.flowable.service.IFlowDefinitionService;
import com.ruoyi.flowable.service.IProcessPathAnalysisService;
import com.ruoyi.system.domain.SysExpression;
import com.ruoyi.system.service.ISysExpressionService;
import com.ruoyi.system.service.ISysRoleService;
import com.ruoyi.system.service.ISysUserService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import jakarta.annotation.Resource;

import javax.imageio.ImageIO;

import jakarta.servlet.http.HttpServletResponse;

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Map;

/**
 * <p>
 * 工作流程定义
 * </p>
 *
 * @author Tony
 * @date 2021-04-03
 */
@Slf4j
@RestController
@RequestMapping("/flowable/definition")
public class FlowDefinitionController extends BaseController {

    @Autowired
    private IFlowDefinitionService flowDefinitionService;

    @Autowired
    private ISysUserService userService;

    @Resource
    private ISysRoleService sysRoleService;
    @Resource
    private ISysExpressionService sysExpressionService;
    @Resource
    private IProcessPathAnalysisService processPathAnalysisService;

    /**
     * 获取流程实例的完整路径分析
     * @param processInstanceId
     * @return
     */
    @GetMapping(value = "/getPath")
    public AjaxResult getPath(@RequestParam("processInstanceId") String processInstanceId) {
        return AjaxResult.success(processPathAnalysisService.analyzeProcessPath(processInstanceId));
    }

    /**
     * 流程定义列表
     *
     * @param pageNum  当前页码
     * @param pageSize 每页条数
     * @param name     流程名称
     * @return
     */
    @GetMapping(value = "/list")
    public AjaxResult list(@RequestParam("pageNum") Integer pageNum,
                           @RequestParam("pageSize") Integer pageSize,
                           @RequestParam(value = "name", required = false) String name) {
        return AjaxResult.success(flowDefinitionService.list(name, pageNum, pageSize));
    }

    /**
     * 根据名称查询最新流程定义
     * @param name
     * @return
     */
    @GetMapping(value = "/getInfo")
    public AjaxResult list(@RequestParam(value = "name") String name) {
        return AjaxResult.success(flowDefinitionService.getInfo(name));
    }

    /**
     * 导入流程文件 上传bpmn20的xml文件
     *
     * @param name
     * @param category
     * @param file
     * @return
     */
    @PostMapping("/import")
    public AjaxResult importFile(@RequestParam(value = "name", required = false) String name,
                                 @RequestParam(value = "category", required = false) String category,
                                 @RequestParam("file") MultipartFile file) {
        InputStream in = null;
        try {
            in = file.getInputStream();
            flowDefinitionService.importFile(name, category, in);
        } catch (Exception e) {
            log.error("导入失败:", e);
            return AjaxResult.success(e.getMessage());
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (IOException e) {
                log.error("关闭输入流出错", e);
            }
        }

        return AjaxResult.success("导入成功");
    }


    /**
     * 读取xml文件
     *
     * @param deployId 流程定义id
     * @return
     */
    @GetMapping("/readXml/{deployId}")
    public AjaxResult readXml(@PathVariable(value = "deployId") String deployId) {
        try {
            return flowDefinitionService.readXml(deployId);
        } catch (Exception e) {
            return AjaxResult.error("加载xml文件异常");
        }

    }

    /**
     * 读取图片文件
     *
     * @param deployId 流程定义id
     * @param response
     */
    @GetMapping("/readImage/{deployId}")
    public void readImage(@PathVariable(value = "deployId") String deployId, HttpServletResponse response) {
        OutputStream os = null;
        BufferedImage image = null;
        try {
            image = ImageIO.read(flowDefinitionService.readImage(deployId));
            response.setContentType("image/png");
            os = response.getOutputStream();
            if (image != null) {
                ImageIO.write(image, "png", os);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (os != null) {
                    os.flush();
                    os.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }


    //保存流程设计器内的xml文件
    @Log(title = "流程定义", businessType = BusinessType.INSERT)
    @PostMapping("/save")
    public AjaxResult save(@RequestBody FlowSaveXmlVo vo) {
        InputStream in = null;
        try {
            in = new ByteArrayInputStream(vo.getXml().getBytes(StandardCharsets.UTF_8));
            flowDefinitionService.importFile(vo.getName(), vo.getCategory(), in);
        } catch (Exception e) {
            log.error("导入失败:", e);
            return AjaxResult.error(e.getMessage());
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (IOException e) {
                log.error("关闭输入流出错", e);
            }
        }

        return AjaxResult.success("导入成功");
    }

    /**
     * 发起流程
     *
     * @param procDefId 流程定义id
     * @param variables 变量集合,json对象
     * @return
     */
    @Log(title = "发起流程", businessType = BusinessType.INSERT)
    @PostMapping("/start/{procDefId}")
    public AjaxResult start(@PathVariable(value = "procDefId") String procDefId,
                            @RequestBody Map<String, Object> variables) {
        return flowDefinitionService.startProcessInstanceById(procDefId, variables);
    }

    /**
     * 激活或挂起流程定义
     *
     * @param state    1:激活,2:挂起
     * @param deployId 流程部署ID
     * @return
     */
    @Log(title = "激活/挂起流程", businessType = BusinessType.UPDATE)
    @PutMapping(value = "/updateState")
    public AjaxResult updateState(@RequestParam("state") Integer state,
                                  @RequestParam("deployId") String deployId) {
        flowDefinitionService.updateState(state, deployId);
        return AjaxResult.success();
    }

    //删除流程
    @Log(title = "删除流程", businessType = BusinessType.DELETE)
    @DeleteMapping(value = "/{deployIds}")
    public AjaxResult delete(@PathVariable("deployIds") String[] deployIds) {
        for (String deployId : deployIds) {
            flowDefinitionService.delete(deployId);
        }
        return AjaxResult.success();
    }

    //指定流程办理人员列表
    @GetMapping("/userList")
    public AjaxResult userList(@ModelAttribute SysUser user) {
        List<SysUser> list = userService.selectUserList(user);
        return AjaxResult.success(list);
    }

    //指定流程办理组列表
    @GetMapping("/roleList")
    public AjaxResult roleList(@ModelAttribute SysRole role) {
        List<SysRole> list = sysRoleService.selectRoleList(role);
        return AjaxResult.success(list);
    }

    //指定流程达式列表
    @GetMapping("/expList")
    public AjaxResult expList(@ModelAttribute SysExpression sysExpression) {
        List<SysExpression> list = sysExpressionService.selectSysExpressionList(sysExpression);
        return AjaxResult.success(list);
    }

}
